212122112112021 has 8 divisors (see below), whose sum is σ = 282831156119200. Its totient is φ = 141413904756432.

The previous prime is 212122112112011. The next prime is 212122112112037. The reversal of 212122112112021 is 120211211221212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212122112112021 - 2²⁶ = 212122045003157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122112112011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208571071 + ... + 209585628.

It is an arithmetic number, because the mean of its divisors is an integer number (35353894514900).

Almost surely, 2^{212122112112021} is an apocalyptic number.

It is an amenable number.

212122112112021 is a deficient number, since it is larger than the sum of its proper divisors (70709044007179).

212122112112021 is a wasteful number, since it uses less digits than its factorization.

212122112112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418325795.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212122112112021 its reverse (120211211221212), we get a palindrome (332333323333233).

The spelling of 212122112112021 in words is "two hundred twelve trillion, one hundred twenty-two billion, one hundred twelve million, one hundred twelve thousand, twenty-one".